White Balance Adjustment - LG 47LH90 Service Manual

・HDMI IV [C/S: 1D9A]
EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF
0x01 01 13 01 03 80 73
0x02 09 48 4C A1 08 00
0x03 01 01 01 01 01 01
0x04 45 00 7E 8A 42 00
0x05 6E 28 55 00 7E 8A
0x06 3F 1F 52 10 00 0A
0x07 00 4C 47 20 54 56
EDID Block 1, Bytes 128-255 [80H-FFH]
Block Type: CEA EDID Timing Extension Version 3
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x08 02 03 1F F1 47 10
0x09 09 07 07 67 03 0C
0x0A 3A 80 18 71 38 2D
0x0B 1E 01 1D 80 18 71
0x0C 00 00 9E 01 1D 00
0x0D 8A 42 00 00 1E 8C
0x0E 00 7E 8A 42 00 00
0x0F 20 25 00 7E 8A 42
・RGB [C/S: 36]
EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3
0 1 2 3 4 5
00 00 FF FF FF FF FF
10 01 13 01 03 68 73
20 09 48 4C A1 08 00
30 01 01 01 01 01 01
40 45 00 7E 8A 42 00
50 6E 28 55 00 7E 8A
60 3F 1F 52 10 00 0A
70 00 4C 47 20 54 56
*After Board level adjustment, set volume setting value 0
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
FF 00 1E 6D 02 00 01
41 78 0A CF 74 A3 57
A9 40 81 80 61 40 45
02 3A 80 18 71 38 2D
00 1E 01 1D 00 72 51
42 00 00 1E 00 00 00
20 20 20 20 20 20 00
0A 20 20 20 20 20 20
22 20 05 84 03 02 26
00 10 00 88 2D E3 05
40 58 2C 04 05 7E 8A
1C 16 20 58 2C 25 00
72 51 D0 1E 20 6E 28
0A D0 8A 20 E0 2D 10
18 26 36 80 A0 70 38
00 00 1A 00 00 00 00
6 7 8 9 A B C
FF 00 1E 6D 02 00 01
41 78 0A CF 74 A3 57
A9 40 81 80 61 40 45
02 3A 80 18 71 38 2D
00 1E 01 1D 00 72 51
42 00 00 1E 00 00 00
20 20 20 20 20 20 00
0A 20 20 20 20 20 20

5.3. White Balance Adjustment

(1) Overview
• W/B adj. Objective & How-it-works
- Objective: To reduce each Panel's W/B deviation
- How-it-works: When R/G/B gain in the OSD is at 192, it
01 01 01
4C B0 23
40 31 40
40 58 2C
D0 1E 20
FD 00 39
00 00 FC
(2) Equipment
20 01 1D
1) Color Analyzer : CA-210 (White LED Module :
CH14/NCG : CH 9 / WCG: CH12 )
2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
3) Adjust Remocon
4) Video Signal Generator MSPG-925F 720p/216Gray
15 07 50 (Model:217, Pattern:78)
03 01 02
-> Only when internal pattern is not available
42 00 00
7E 8A 42
• Color Analyzer Matrix should be calibrated using CS-1000
55 00 7E
10 3E 96
(3) Equipment connection MAP
1F 40 30
00 00 9A
(4) Equipment connection map
D E F
01 01 01
4C B0 23
40 31 40
40 58 2C
Connection Diagram of Automatic Adjustment
D0 1E 20
FD 00 39
(5) Adj. Command (Protocol)
00 00 FC
20 00 36
•RS-232C Command used during auto-adj.
RS-232C COMMAND
[CMD ID
wb 00
wb 00
Ex) ld 00 00 -> Aging Time
wb 00 00 -> Begin white balance auto-adj.
wb 00 10 -> Gain adj.
ja 00 ff -> Adj. data
jb 00 c0
...
...
wb 00 1f -> Gain adj. complete
*(wb 00 20(Start), wb 00 2f(End)) -> Off-set adj.
wb 00 ff -> End white balance auto-adj.
- 11 -
means the panel is at its Full Dynamic
Range. In order to prevent saturation of
Full Dynamic range and data, one of
R/G/B is fixed at 192, and the other two is
lowered to find the desired value.
Probe
RS -232C
Signal Source
* If TV internal pattern is used, not needed
Meaning
DATA]
00 Begin White Balance adj.
ff End White Balance adj.(Internal pattern disappeared)
Co lo r Analyzer
RS -232C
Co m p ut er
RS -232C
Pat t ern Generat o r
LGE Internal Use Only